A few weeks ago I had to re-install my computer, since then, I've run into a bunch of problems with the launcher. I forgot to copy/paste the logs when I had the chance...
The current problem is the launcher experiencing a fatal error. I tried looking to see if it was found here: http://dinnerbone.com/mojira/crash_search/
I've pasted the log onto a .txt document.
I hope that my issues can be resolved, I've been playing since beta.

Edit: Even if I delete the whole file, and replace it with a previously working one, the same thing comes up.